GB587333A - Improvements in or relating to the production of resinous compositions - Google Patents

Abstract

Polyvinyl ketals or acetals, or mixtures of both, are heated together with a polyhydric alcohol ester, which has been completely esterified with a non-hydroxylated mono-basic carboxylic acid containing at least 6 carbon atoms, at a temperature of at least 100 DEG C. to give a mixture which is homogeneous at ordinary temperatures. The amount of acetal or ketal is usually between 20 per cent and 80 per cent of the total weight of the mixture. The acid constituents of the esters include saturated or unsaturated monobasic aliphatic, cycloaliphatic, aromatic and carboxylic acids. Those preferred are the long chain aliphatic acids containing from 12 to 18 carbon atoms, particularly such acids derived from the non-hydroxylated natural oils. Suitable acids are caproic, caprylic, capric, lauric, myristic, palmitic, stearic, melissic, beta-furyl acrylic, sorbic, undecylenic, oleic, elaidic, linoleic, linolenic, nonadecanoic, behenic, cyclohexane carboxylic, benzoic, abietic and naphthenic, and the mixed acids derived from unmodified oils such as linseed, chinawood, soya bean, sunflower, perilla, oiticica, olive, palm, seal and lard oils. Preferred esters are triglycerides such as these natural oils. The polyhydric alcohol constituents include ethylene glycol, glycerol, diethylene glycol, polyethylene glycol, pentaerythritol, mannitol, sorbitol, octamethylene glycol and decamethylene glycol. Specified acetals are those derived from formaldehyde, acetaldehyde, butyraldehyde, propionaldehyde, heptaldehyde, citral, benzaldehyde, salicylaldehyde, p - nitrobenzaldehyde, cinnamaldehyde, p-chlorobenzaldehyde, anisaldehyde and furfural; and ketals those derived from acetone, 2,2-diethoxy butane, mesityl oxide, phorone, cyclohexanone, acetophenone, p-nitro- and p-chloro-acetophenone, benzophenone, benzalacetophenone, pulezone and methyl-2-thienyl ketone. Mixed acetals or ketals may be used. Examples illustrate the use of the product in coating compositions using toluene or ethyl alcohol and xylene as solvents and containing cobalt, manganese, lead or iron naphthenate as a drier. Other materials such as pigments, synthetic or natural resins, plasticisers, fillers, waxes, oxidation inhibitors, catalysts and solvents, of which many examples are specified, may be added.